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USER INTERFACE BOARD TEST (continued)
LED
V718
TEST PROCEDURE
Use always electrically insulate gloves during this test procedure
1. Remove input power from the wire feed unit.
2. Follow the LF56D User Interface removal procedure available inside this manual to get access to the connector
X100. See Figure 1.
3. Do not unplug the User Interface board from the Power Feeder. Keep it connected as indicated in Figure 1.
4. Visually check for burned or damaged components. If any components are physically damaged the motor control
board has to be replaced.
5. Apply the correct input power to the wire feeder connecting it through control cable to the power source.
6. Locate the User Interface board connector X1 and using the multimeter perform the tests as indicated in Test
Table 1.
Test table 1 – LF 56D User Interface Board test
Test Points
Expected reading
X1
pin 4(+) to
pin 3(-)
-
Figure 1 – LF 56D User Interface component
PCB LEDs status
and color
40VDC
-
V718 red
-
ON
For LF56D
+40VDC power supply from Control Board
3,3 Vdc generated by the User Interface board is present
X1
Note
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